CVE-2021-4209

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.90% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 79.4% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-08-24 15:07Z4 YR AGO

Last updated

2026-10-14 10:04Z15 DAYS AGO

Reserved

2022-01-24

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

3633a21ff6233c85a628ee981b38877dc02383ab2422eb4207921933fad75617

• gitlab.comhttps://gitlab.com/gnutls/gnutls/-/issues/1306x_refsource_MISC
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2044156x_refsource_MISC
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2021-4209x_refsource_MISC
• gitlab.comhttps://gitlab.com/gnutls/gnutls/-/merge_requests/1503x_refsource_MISC
• gitlab.comhttps://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568x_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20220915-0005/x_refsource_CONFIRM
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html